I'm not sure how you could tap your foot to the Wuorinen concerto, but I listened to it and his Lepton, and enjoyed the energy level and variety of texture. I wonder if some of that could be brought into more accessible music.

It is possible that it was due to an ephemeral state brought on by listening to an hour of the other stuff. But:

I could tap my foot because the first beat of many measures was emphasized, and notes tended to have only a few lengths, which were integer multiples or divisions of one typical length, which in turn was an integer division of a measure. And I did tap my foot because the piano is more forgiving to "let's mess with octaves" moments, and the piece involved things like harmony and phrasing. There may even have been a cadence in there somewhere.